How to use Nio direct buffer to copy files in java8

This article mainly explains "how to use Nio direct buffer to copy files in java8". Interested friends may wish to have a look. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn "how to use Nio direct buffer to copy files in java8".

/ / use direct buffer to copy files (memory-mapped files) @ Testpublic void test2 () {FileChannel inChannel=null; FileChannel outChannel=null; try {inChannel=FileChannel.open (Paths.get ("1.jpg"), StandardOpenOption.READ); outChannel=FileChannel.open (Paths.get ("3.jpg"), StandardOpenOption.READ,StandardOpenOption.WRITE,StandardOpenOption.CREATE_NEW) / / memory mapping file MappedByteBuffer inMapBuffer=inChannel.map (FileChannel.MapMode.READ_ONLY,0,inChannel.size ()); MappedByteBuffer outMapBuffer=outChannel.map (FileChannel.MapMode.READ_WRITE, 0djinChannel.size ()); / / read and write data directly to the buffer byte [] bytes=new byte [inMapBuffer.limit ()]; inMapBuffer.get (bytes); outMapBuffer.put (bytes) } catch (IOException e) {e.printStackTrace ();} finally {if {inChannel.close ();} catch (IOException e) {e.printStackTrace ();}} if (outChannelists null) {try {outChannel.close () } catch (IOException e) {e.printStackTrace ();} at this point, I believe you have a deeper understanding of "how to use the Nio direct buffer in java8 to copy files". You might as well do it in practice! Here is the website, more related content can enter the relevant channels to inquire, follow us, continue to learn!